(A) The term heterozygote refers to an individual with one normal and one mutant allele at a given locus on a pair of homologous chromosomes. An individual who is heterozygous for the abnormal gene does not manifest obvious symptoms. (B) Disorders carried on either the X or Y sex chromosome are referred to as sex-linked recessive. (C) Either sex may be affected by autosomal recessive genetic disorders because the responsible allele can be on any one of the 46 chromosomes. (D) If both parents are affected by the disorder and are not just carriers, then all their children would manifest the same disorder.

Section: Questions Set C
Explanation:
(A) Digoxin is a cardiac glycoside given to clients in heart failure to improve their myocardial contractility. (B) Furosemide is a loop diuretic given to clients in heart failure to promote diuresis. (C) O2is given to clients in heart failure to increase oxygenation and to prevent or treat hypoxemia. (D) Nitroglycerin is a nitrate given to clients in heart failure to increase their cardiac output by decreasing the peripheral resistance that the left ventricle must pump against.

(A) This situation provides specific evidence that the client is able to integrate muscle relaxation technique into his lifestyle to alleviate anxiety. (B) The client may not experience anxiety at the concert, but there is no evidence regarding the technique that he used to alleviate anxiety. (C) The client may state he no longer experiences anxiety, but there is no evidence demonstrating this. He may be denying anxiety to discontinue therapy
prematurely. (D) Does he experience anxiety in the darkroom? He may have taken this job
to force himself to deal with the phobia directly.

(A) Because of the possibility of fever or respiratory failure, vital signs should be done more often than every eight hours. (B) If the epiglottitis worsens, the edema and laryngospasm may close the airway and an emergency tracheostomy may be necessary. (C) Although intake and output are a part of the nursing care of a child with epiglottitis, it is not as important as the safety measure of keeping the tracheostomy set at the bedside. (D) Specific gravity will indicate hydration status, but it is not as important as keeping the tracheostomy set at the bedside.

Explanation
(A) This action would further increase the client's blood sugar. (B) NPH insulin is an intermediate-acting insulin, with an average of 4-6 hours before onset of action. The client needs insulin that will act immediately.
During a ketoacidotic state, the client is dehydrated, so any insulin administered SC will be poorly absorbed.
(C) Regular insulin is the fastest acting-insulin; when given IV, it will immediately act to decrease blood sugar. Regular insulin is given to decrease blood glucose levels by promoting metabolism of glucose, inhibiting lipolysis and formation of ketone bodies. (D) This action would further increase the client's blood sugar.